Companies

Astro Mechanica

astromecha.co

Astro Mechanica builds efficient adaptive jet engines and supersonic aircraft for defense and future commercial aviation.

HQSan Francisco, California, United States
Employees51-200
44 active roles
Jobs checked 16h ago
Aerospace / DefenseNot AIHardwareSeed

About

Astro Mechanica is a vertically integrated aerospace company developing engines, airframes, and flight systems, led by its turboelectric adaptive engine for efficient flight across speeds. It plans to sell propulsion systems to defense manufacturers while pursuing its own supersonic aircraft and eventual commercial applications; its differentiation is decoupling turbine-generated electricity from the fan and compressor to improve efficiency and flexibility.

Market

Astro Mechanica competes in aerospace propulsion and high-speed aircraft, spanning defense, unmanned systems, and prospective commercial supersonic aviation. Its positioning centers on an adaptive hybrid-electric engine designed to remain efficient across subsonic and supersonic speeds, rather than optimizing for only one flight regime. The architecture separates the gas-turbine generator from electrically driven airflow components, creating operating flexibility and substantial electrical power for systems such as electronic warfare and intelligence, surveillance, and reconnaissance.

Target Customers

Astro Mechanica’s primary near-term customers are established defense and aerospace manufacturers, government defense organizations, and military aircraft programs seeking efficient supersonic propulsion, high onboard electrical power, or long-range unmanned aircraft capabilities. Its longer-term customer base may include commercial aircraft manufacturers and airlines pursuing affordable long-range supersonic travel.

At a Glance

Problem

Astro Mechanica is addressing the longstanding speed–efficiency tradeoff in jet aviation. Conventional engines and airframes have improved incrementally, but faster flight generally requires substantially more energy: energy requirements rise with the square of velocity, while turbofans gain fuel efficiency by sacrificing speed. That makes supersonic aircraft expensive to operate and limits their range and commercial usefulness.

The company’s initial “killer” use case is space launch, where its technology is intended to air-launch rockets and increase payload capacity while reducing launch cost. Astro Mechanica says air-launching at speed could deliver 3.5 times more payload capacity at 3.5 times lower cost than ground launch. Longer term, the same capability is intended to enable private and eventually commercial point-to-point flights that are roughly three times faster than conventional airliners.

Product / Service

Astro Mechanica’s core product is Duality, an electric combined-cycle or Electric Adaptive Engine designed to operate efficiently from takeoff through Mach 3+. Electric motors drive the compressor at variable speeds, allowing the engine to adapt to changing airspeed and combustion conditions rather than being optimized for only one part of the flight envelope. The company is building an integrated stack of engines, airframes, and flight systems rather than supplying an isolated component.

The delivery model is staged. Astro Mechanica plans to use launch and defense applications to validate the propulsion system and build manufacturing capability, sell propulsion systems to defense manufacturers in the interim, and ultimately manufacture, operate, and maintain its own supersonic aircraft. The claimed benefit is a propulsion system that combines lower operating cost and greater range with much higher speed; the company also emphasizes unusually rapid prototype development using off-the-shelf hardware.

Market

Astro Mechanica sits at the intersection of advanced aerospace propulsion, supersonic aircraft, orbital launch, and defense aviation. Its launch strategy puts it alongside small-launch providers such as Rocket Lab and Firefly, while its eventual aircraft ambitions place it in the broader supersonic-aircraft competitive set that includes Boom Supersonic and Hermeus. Its defense opportunity includes propulsion for unmanned or autonomous aircraft, including aircraft intended to fly long distances at Mach 2–3.

The company is active but still pre-commercial on the evidence available. Y Combinator lists it as a 2021-founded, Winter 2024 company with 52 employees, and Astro Mechanica announced a $27.1 million funding round in April 2025. A July 2026 profile reports that it had completed its first flight engine and test-fired prototype hardware, while its public hiring and news activity show continued development. The disclosed traction is therefore funding, hiring, prototype construction, and testing—not recurring revenue or an operating passenger-flight service.

Founders & Leadership

Ian BrookeFounder
CEO & Founder
Ashley PelzelChief Operating Officer

Funding History

2024-07
Seed$500K

Y Combinator

2025-04
Series A$27.1M

Andreessen Horowitz (a16z), Lowercarbon, Giant Step Capital

2025-08
Series AUndisclosed

United Airlines Ventures

Recent News

2026-06-01
How Electric Hypercar Tech Could Bring Back Supersonic Air Travel (At Last!)

MotorTrend reported that electric motors will power the fan stage of Astro Mechanica’s proposed Duality turboelectric adaptive engine, linking hypercar motor technology to potential supersonic flight.

2026-05-09
The Founder Challenging Modern Aviation

This S3 video feature profiles Astro Mechanica’s effort to develop a radically different approach to supersonic travel, with aircraft designed around the engine.

2026-01-14product
Startup’s Supersonic Electric Jet Engine Heads To Altitude Testing

Aviation Week reported that Astro Mechanica planned high-altitude and high-speed ground testing of its hybrid-electric supersonic engine in 2026, followed by a planned 2027 flight in a propulsion testbed aircraft.

2025-12-22
Building Long-Range Supersonic Planes

Relentless published a video feature on Astro Mechanica’s work to develop long-range supersonic aircraft.

2025-12-19product
Astro Mechanica's Electric Supersonic Engine To Be Tested

Aviation Week covered Astro Mechanica’s plans to conduct high-altitude and high-speed ground testing of its hybrid-electric supersonic engine during 2026.

2025-12-14product
Astro Mechanica's Hybrid Engine Redefines Supersonic ...

New Atlas reported that Astro Mechanica was testing the fourth-generation engine prototype and targeting a first flight within three years.

2025-12-02partnership
Astro Mechanica Partners with British Motor Maker on Supersonic Engine Concept

Astro Mechanica partnered with British motor maker Helix, which is providing electric motors for the Duality adaptive engine concept. The partnership covers current prototype motors and future motors for a full-scale propulsion system.

2025-08-20funding
United Airlines Ventures Invests in Aerospace Startup Astro Mechanica

United Airlines Ventures announced an investment in Astro Mechanica to support its adaptive propulsion and airframe technology. The company’s Duality engine is being developed first for military applications, with potential uses in defense, orbital launch, cargo, and later commercial aviation.

Active Roles

44
San Francisco/Operations/10d ago
San Francisco/Operations/16d ago
San Francisco/Operations/21d ago
San Francisco/Engineering/21d ago
San Francisco/Engineering/34d ago
Technical Buyer$155k – $185k
San Francisco/Operations/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
Senior Test Engineer$150k – $225k
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago
San Francisco/Engineering/34d ago

Business Model

Astro Mechanica plans to generate revenue by selling propulsion systems to defense manufacturers and, ultimately, its own aircraft. The company has indicated an engine price in the low single-digit millions for a Mach-plus-capable engine and aircraft prices of approximately $15 million–$50 million, depending on capabilities.

Products

Turboelectric Adaptive Engine, also described as a hybrid-electric supersonic engineLong-range supersonic aircraft and demonstrator airframesPropulsion systems supplied to defense and aerospace manufacturersIntegrated aerospace flight systems

Tech Stack

Turboelectric/hybrid-electric propulsionCompact gas-turbine turbogeneratorHigh-power electric motors for independently driven fans and compressorsAdaptive compressor and airflow control across subsonic-to-supersonic flightIntegrated engines, airframes, and flight systems

Competitors

Boom Supersonic
Hermeus
Venus Aerospace
Destinus
Exosonic
Airbus
Boeing
Lockheed Martin